loop 0: add the Netscape Gif extension Loop count field to the output. Produced better looking output, but the final GIF was considerably larger at 6.2MB, so I can't upload it. ss 00:00:17 -to 00:00:22 -f image2pipe -vcodec ppm - |Ĭonvert -deconstruct -delay 5 -loop 0 - STS-132_Liftoff_Space_Shuttle_Atlantis_512x.gif Image info: 995kB, 45 frames, 512x512 apparent size, coalesced.įor the Atlantis shuttle footage, and analogous: ffmpeg -i STS-132_Liftoff_Space_Shuttle_Atlantis.ogv -r 15 -vf scale=512:-1 \ Opengl-rotating-triangle-image-magick.gif ss 00:00:03 -to 00:00:06 -f image2pipe -vcodec ppm - |Ĭonvert -deconstruct -delay 5 -loop 0 - opengl-rotating-triangle-image-magick.gif
#Convert gif to video for mac install
The best I had was something along: sudo apt-get install ffmpeg imagemagickįfmpeg -i opengl-rotating-triangle.mp4 -r 15 -vf scale=512:-1 \ Image info: 1.5MB, 30 frames, 512x288 apparent size, conversion time on a Lenovo P51: 43s.Ī more direct: sudo apt-get install ffmpegĪlso works, but the output GIF would be way larger than the input video, because video formats can compress more efficiently across frames with advanced algorithms, while GIF can only does a simple rectangular frame diff.īefore pre 18.04: ffmpeg + convert one-liner without intermediate filesįfmpeg could not handle GIF previously. Here is a version with palettegen but only 2 seconds to fit the 2MiB upload limit: Image info: 1.3MB, 75 frames, 512x288 apparent size, coalesced (has minimal effect however, because footage pans slightly from the start), conversion time on a Lenovo P51: 2.3s. STS-132_Liftoff_Space_Shuttle_Atlantis.gif If you want to see the result quality of a video camera video from Wikimedia Commons with a similar command: wget įfmpeg -i STS-132_Liftoff_Space_Shuttle_Atlantis.ogv -r 15 -vf scale=512:-1 \ With smaller GIFs, the lower framerate is less noticeable, and so we can skip some frames and make smaller GIFs. I recommend this option because video formats usually have a higher framerate due to the larger resolution. The input FPS can be found with ffprobe, and the total number of input frames can be found with mediainfo as explained at: The perceived output FPS is adjusted to match the input however, so you won't notice a speedup, only greater granularity. The original video height can be found for example with ffprobe: and is 1024 x 1024 in our case.įor example, the original video was 30 FPS, so -r 15 means that ffmpeg will pick one frame in every 2 ( = 30 / 15). If you remove this option, the output GIF has the same height as the input video. This is a common use case for images for the web, which tend to have much smaller resolution than video. vf scale=512:-1: make the output 512 pixels in height, and adjust width to maintain the aspect ratio. No, GIFs are not the best way to pirate distribute videos online. ss 00:00:03 -to 00:00:06: start and end time to cut the video from. We could also play with documented palettegen parameters like palettegen=max_colors=16 to achieve different size quality trade-off points.
#Convert gif to video for mac how to
TODO: why does simply choosing a palette increase the image size? Is it because now more colors so we need more bits per color? How to observe each palette? the dotting pattern is much less visible now.Image info: 979K, 45 frames, 512x512 apparent size, coalesced, conversion time on a Lenovo P51: 3.5s. vf "scale=512:-1,split palettegen paletteuse" \ We can try to improve the image quality with methods described at:Į.g.
The output has a visible dotting pattern, which is not as visible in "ffmpeg + convert" method below. Test data generation procedure described on this post. 500MB however failed because ffmpeg failed to load its shared libraries. The above conversion also worked after a ulimit -Sv 1000000 (DRAM usage limited to 1GB), so it does "not consume huge amounts of memory" like previous attempts I did with Imagemagick which almost killed my machine. Image info: 426kB, 45 frames, 512x512 apparent size, coalesced, conversion time on a Lenovo P51: 0.5s. You likely want to use something like: sudo apt install ffmpeg Ffmpeg 3.4.4 can do it directly on Ubuntu 18.04
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